Isolation Layer Performance Experimental And Research On The Parallel Composite Isolation System

The friction-sliding isolation system equivalent damping is big, but the horizontal stiffness is small. The parallel composite isolation system is composited by rubber isolation bearings and friction-sliding isolation bearings. This test is based on shaking table test of base-isolated structures isolation layer pseudo-static experimental and earthquake simulation experiment research, and the results are the parallel composite isolation system vibration periods is long and damping is big.We analyze composite seismic-isolation structure calculation of isolation layer, and calculated characteristics are that isolation structure and seismic structures are the same when friction-sliding bearings don't slide in small earthquakes. That's say isolation layer stiffness is infinite; When the structure of the bottom shear yield than isolation layer, the sliding bearings will slide ,and this time the isolation layer general level stiffness are all rubber isolation bearings stiffness. Compared with pure rubber isolation structure isolation layer damping performance composite base-isolated structures isolation layer damping performance is little difference in small earthquakes, but under the strong earthquakes composite isolation isolation layer damping performance advantages have been very good, and composite base-isolated structures damping effect is better than traditional anti-seismic structure.In different compound isolation scheme adopts sine waves and simulated shaking-table test get isolation layer damping performance and force - displacement curve of composite isolation layer, and results show that parallel isolation layer analysis model are pure rubber isolation layer hysteresis curve and the pure friction isolation layer hysteresis curve. That's consistent with the theoretical hypothesis.The parallel composite isolation system are parallel composited by rubber isolation bearings and friction-sliding isolation bearings. Composite isolation designing and researching are finished by experiment and analysis of general software and how to do the experiment input computer correctly is the key of software analysis. Based on the composite seismic-isolation structure based on the shaking table test of test parameters of the model were studied and it's a very good reference value for application SAP2000 analysis composite seismic-isolation structure.